Six years ago the editors of the Encyclopedia of Medical Radiology selected two additional editors from the emerging generation of young radiologists to complete this unique compendium of radiology. Klaus Ranniger was one of them and he worked with enthusiasm and great energy at the challenge facing him. His editorial work was excellent and he succeeded in winning internationally acclaimed scientists to contribute to this volume. Their chapters have met the requirements and goals we set out to achieve in every aspect and to the highest degree. The majority of the authors valued Klaus Ranniger...